JP3733802B2 - Display device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a display device, and more particularly to a technique for arranging display elements in a display device.
[0002]
[Prior art]
A liquid crystal display device is known as a flat display device. However, since the liquid crystal display device has problems such as a narrow viewing angle and poor response characteristics, an electroluminescence element (hereinafter, referred to as a display element). An EL display device using “EL element” has been developed.
[0003]
One method for expressing halftone using such an EL element is a method described in JP-A-11-73158. In such a method, a plurality of driving transistors and a plurality of EL elements having different light emission intensities are arranged in a row for one pixel, and the plurality of driving transistors and the plurality of EL elements are connected in series, respectively. The expression of is realized.
[0004]
[Problems to be solved by the invention]
When an attempt is made to express a halftone by combining display elements, how to arrange the display elements is a very important problem.
[0005]
For example, the position of the light emission center of gravity at the time of halftone expression is determined by the arrangement of the display elements. is there.
[0006]
Further, although the shape of each pixel largely depends on the arrangement of the display elements, it is originally desirable that the shape of each pixel has an aspect ratio of 1. This is because if the aspect ratio is 1, the aspect ratio of the graphic or the like to be displayed is correctly reproduced.
[0007]
In order to realize high-definition display, it is necessary to reduce the area occupied by each pixel as much as possible and increase the number of pixels per unit area. For that purpose, it is important to arrange the pixels and the display elements so as not to cause a dead space.
[0008]
However, conventionally, from the above point of view, the problems related to the arrangement of display elements in each pixel have not been sufficiently studied.
[0009]
Therefore, the present invention relates to the arrangement of display element groups arranged in each pixel, reduces the bias of the light emission center of gravity at the time of halftone expression while taking into account the aspect ratio of the pixel shape, and dead between pixels and within pixels. The object is to realize an arrangement that can reduce the space.
[0010]
[Means for Solving the Problems]
The present invention includes pixels formed in a matrix, and each pixel is provided with n (n ≧ 3) display elements, and gradation is controlled by controlling the light emission state of the n display elements. In the display device that performs display, the n display elements in each pixel include at least one combination of three display elements arranged so that a figure connecting the centers of gravity of the display elements is a triangle. It is characterized by being.
[0011]
The triangle is preferably an isosceles triangle. In addition, it is preferable that at least one display element among the three display elements arranged to form the triangle overlaps with a region that surrounds the other two display elements to a minimum.
[0012]
The present invention includes pixels formed in a matrix, and each pixel is provided with n (n ≧ 3) display elements, and gradation is controlled by controlling the light emission state of the n display elements. A display device for performing display, wherein the n display elements are arranged in two columns, (n−1) / 2 in one column and (n + 1) / 2 in the other column. Is arranged.
[0013]
The present invention includes pixels formed in a matrix. Each pixel includes n display elements (n ≧ 3), and the number of gradations that can be displayed per pixel is 2. ^p In the case of gradation, n and p are n + 1 = 2. ^p The n display elements are classified into p groups, and the i (1 ≦ i ≦ p) -th group has 2 ^i-1 A display device to which display elements are allocated and which performs gradation display by controlling the light emission state of the n display elements in units of groups, wherein the n display elements are arranged in two rows The display element groups assigned to the first to (p-1) th groups are arranged in one column, and the display element group assigned to the pth group is arranged in the other column.
[0014]
The present invention includes pixels formed in a matrix. Each pixel includes n display elements (n ≧ 3), and the number of gradations that can be displayed per pixel is 2. ^p In the case of gradation, n and p are n + 1 = 2. ^p The n display elements are classified into p groups, and the i (1 ≦ i ≦ p) -th group has 2 ^i-1 A display device to which display elements are allocated and which performs gradation display by controlling the light emission state of the n display elements in units of groups, wherein the n display elements are arranged in two rows The display element group assigned to each group other than the first group is characterized in that half are arranged in one column and the other half are arranged in the other column.
[0015]
The present invention includes pixels formed in a matrix. Each pixel includes n display elements (n ≧ 3), and the number of gradations that can be displayed per pixel is 2. ^p In the case of gradation, n and p are n + 1 = 2. ^p The n display elements are classified into p groups, and the i (1 ≦ i ≦ p) -th group has 2 ^i-1 A display device to which display elements are allocated and which performs gradation display by controlling the light emission state of the n display elements in units of groups, wherein the n display elements are arranged in two rows The display element group assigned to the first group is assigned to the first column, the display element group assigned to the second group is assigned to the second column, and the first group and the second group are assigned to the second column. Half of the display element groups assigned to each group are arranged in the first column, and the other half are arranged in the second column.
[0016]
The present invention includes pixels formed in a matrix. Each pixel includes n display elements (n ≧ 3), and the number of gradations that can be displayed per pixel is 2. ^p In the case of gradation, n and p are n + 1 = 2. ^p The n display elements are classified into p groups, and the i (1 ≦ i ≦ p) -th group has 2 ^i-1 Display elements are assigned, and the display device performs gradation display by controlling the light emission state of the n display elements in units of groups, and the barycentric position of the display element group for each group is The n display elements are arranged so as to be positioned on the same straight line with respect to all the groups.
[0017]
The display element in the present invention is preferably an EL element, and the contour is preferably formed in a curved surface shape.
[0018]
The present invention includes a plurality of scanning lines, a plurality of signal lines, and pixels formed in a matrix corresponding to the intersections of the scanning lines and the signal lines, and each pixel includes a plurality of EL elements. The display device performs gradation display by controlling the light emission state of the plurality of EL elements, wherein the plurality of EL elements in each pixel are aligned in either direction of the scanning line or the signal line. A display device characterized by being not arranged.
[0019]
The plurality of EL elements are arranged in at least two columns, and the center of gravity of one EL element in the second column is located at a position approximately equidistant from the center of gravity of two adjacent EL elements in the first column. Preferably it is present.
[0020]
The one EL element is preferably arranged so as to overlap with a region that surrounds the two EL elements to the minimum.
[0021]
The contour of the EL element is preferably formed in a curved surface shape.
[0022]
An electronic apparatus device according to the present invention includes the display device according to the present invention.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a schematic diagram showing the arrangement of display elements in each pixel of a display device according to a first embodiment of the present invention. In this embodiment, three circular display elements 11, 12, and 13 having the same element area are arranged for one pixel.
[0024]
Here, as a method of expressing a halftone by combining display elements, it is possible to realize states having different emission intensities by using display elements having different element areas.
[0025]
However, even if the surface of the display element is rectangular, the portion that actually emits light may not be rectangular. For example, in the case of an organic EL element, the organic EL material is not necessarily formed flat, and is formed in a concave shape as shown in FIG. 13A or a convex shape as shown in FIG. Since the current flows through the thin portion 70 of the organic EL material, light is emitted as shown in FIG. 13C if the material is formed in a concave shape, and in FIG. 13 if the material is formed in a convex shape. Light is emitted as shown in FIG. Here, the hatched portion indicates the portion that emits light (light emission area). In such a case, even if the element area is 1: 2, the light emission area is not 1: 2, and the light emission intensity cannot be accurately set to 1: 2.
[0026]
Therefore, in this embodiment, a plurality of display elements having the same element area are caused to emit light at the same time, thereby realizing a state in which the emission intensity is different. According to this method, since the emission intensity is proportional to the number of display elements, it is possible to express an accurate halftone.
[0027]
In the configuration of this embodiment, a halftone of four gradation levels can be expressed for one pixel. That is, when the three display elements do not emit light, only one display element emits light, when only two display elements emit light, and when three display elements emit light together, the gradation levels are different. This corresponds to 0, 1, 2, and 3.
[0028]
As shown in FIG. 1, the three display elements in one pixel are arranged so that the figure connecting the centroids of the display elements is a triangle 14 and the three display elements are not arranged in a straight line. That is, if the scanning lines are wired in the X direction and the signal lines are wired in the Y direction, the arrangement of the display elements in each pixel in this embodiment is aligned in both the scanning lines and the signal lines. Is not placed.
[0029]
When three display elements are arranged in a straight line, the aspect ratio is 3 (or 1/3). However, by arranging the three display elements so that the centers of the three display elements form a triangle as in this embodiment. The aspect ratio is 1/3 or more and 3 or less, and can be close to 1.
[0030]
In this embodiment, preferably, as shown in FIG. 2, three display elements are arranged so that the triangle is an isosceles triangle (a triangle in which sides 21-22 and 21-23 are equal), and a gradation level is set. The display element 11 is controlled to emit light when the gradation level is 1, and the display elements 12 and 13 are caused to emit light when the gradation level is 2.
[0031]
In this arrangement, when the display elements 12 and 13 form the first column and the display element 11 forms the second column, the center of gravity 21 of one display element 11 in the second column is It is in a state of being equidistant from the centroids 22 and 23 of the two adjacent display elements 12 and 13 in the column.
[0032]
2A shows a case where a halftone of gradation level 1 is expressed, and FIG. 2B shows a case where a halftone of gradation level 2 is expressed. A display element which is shaded emits light. Indicates that In FIG. 2, the center of gravity 21 indicates the center of emission at the gradation level 1, and the center of gravity 24 indicates the center of emission at the gradation level 2. From the figure, it can be seen that the center of gravity 21 and the center of gravity 24 have the same position in the Y direction, and the emission center of gravity is not biased in the Y direction.
[0033]
For comparison, FIG. 3 shows a case where the triangle is not an isosceles triangle. The emission center of gravity 31 at the gradation level 1 and the emission center of gravity 32 at the gradation level 2 are shifted both in the X direction and in the Y direction, and it can be seen that the emission center of gravity is biased.
[0034]
More preferably, as shown in FIG. 4, among the three display elements that form the triangle, one display element (for example, display element 11) surrounds the other two display elements to a minimum. 41 so as to overlap. By arranging in this way, the dead space in the pixel can be reduced, and one pixel can be formed compactly.
[0035]
FIG. 5 shows an equivalent circuit diagram of each pixel when the first embodiment of the present invention is realized by a TFT and an organic EL element. Each pixel includes organic EL elements 10810 to 19812, driving transistors 10710 to 10711 formed of TFTs, selection transistors 10510 to 10511 formed of TFTs, and storage capacitors 10610 to 10611. .
[0036]
The driving transistor 10710 that is a thin film transistor and the organic EL element 10810 that is a current element, and the driving transistor 10711 and the organic EL elements 10811 and 10812 are connected in series, and the organic EL element 10810 and the organic EL element 10811 A set of 10812 is configured to emit light independently.
[0037]
When the gate line 109 is selected at this time, the digital signal is transmitted to the 0th to 1st bit holding capacitors 10610 to 10611 through the 0th to 1st bit selection transistors 10510 to 10511, respectively.
[0038]
In this configuration, a pulse is output from the shift register 101, and the digital signals on the 0th to 1st bit digital signal supply lines 10210 to 10211 are transmitted through the 0th to 1st bit transmission switches 10310 to 10311, respectively. The data is transmitted to bit source lines 10410 to 10411. That is, a digital signal is transmitted to each pixel. The ON / OFF of the 0th to 1st bit driving transistors 10710 to 10711 is controlled by the digital signal, and the 0th to 1st bit organic EL elements 10810 to 10812 emit light or no light according to the digital signal.
[0039]
FIG. 6 shows a plan view and a cross-sectional view of each pixel shown in FIG. The 0th to 1st bit organic EL elements 10810 to 10812 which are display elements have the same element area, and emit light with emission intensity corresponding to the area in the on state. Here, the function of the DA converter is built in for each pixel.
[0040]
In this embodiment, the thin film transistors constituting the shift register 101, the 0th to 1st bit transmission switches 10310 to 10311, the 0th to 1th bit selection transistors 10510 to 10511, the driving transistors 10710 to 10711, and the like are 600 ° C. A polycrystalline silicon thin film transistor formed by the following low temperature process is used, but other elements may be used as long as they have equivalent functions.
[0041]
The 0th to 1st bit organic EL elements 10810 to 10812 are formed by an inkjet process, but may be formed by other processes or current display elements other than the organic EL elements. It doesn't matter.
[0042]
FIG. 7 is a timing chart illustrating a method for driving the display device illustrated in FIG. Due to the pulse SR0 of the shift register 101 in the 0th column, the digital signals D0 and D1 of the digital signal supply lines 10210 to 10211 of the 0th and 1st bits are the potentials of the source lines 10410 to 10411 of the 0th and 0th and 1st bits. It is transmitted to S00 and S01. The 0th and 1st bit digital signals D0 and D1 are transmitted to the potentials S10 and S11 of the 1st column / 0th and 1st bit source lines 10410 to 10411 by the pulse SR1 of the first column shift register 101. Is done.
[0043]
First, when the pulse G0 of the gate line 109 of the 0th row is applied, the potentials S00 and S01 of the 0th column, 0th and 1-bit source lines 10410 to 10411 are set to the 0th row, 0th column, The potentials C000 and C001 of the holding capacitors 10610 to 10611 of the 0th and 1st bits are transmitted to the first column and the potentials S10 and S11 of the 0th and 1st bit source lines 10410 to 10411 are the 0th row, the 1st column, It is transmitted to the potentials C010 and C011 of the 0th and 1st bit holding capacitors 10610 to 10611.
[0044]
Next, when the pulse of the gate line of the first row is applied, the potentials S00 and S01 of the source lines 10410 to 10411 of the 0th column, the 0th and 1st bits are the first row, the 0th column, the 1st row. 0, transmitted to the potentials C100 and C101 of the 1-bit holding capacitors 10610 to 10611, and the potentials S10 and S11 of the source lines 10410 to 10411 of the first column, the 0th and 1st bits are the first row, the first column, the first It is transmitted to the potentials C110 and C111 of the 0 and 1-bit holding capacitors 10610 to 10611.
[0045]
Each organic EL element emits light or does not emit light according to the potential of each storage capacitor, that is, the corresponding digital signal.
[0046]
Here, the resistance of the on-state driving transistor is negligibly smaller than the resistance of the on-state organic EL element. For this reason, the current flowing through the organic EL element is determined only by the resistance of the organic EL element with respect to the voltage between the common electrode 110 and the upper electrode 111, and the resistance of the driving transistor is not affected by an increase or decrease. I'm sorry. Therefore, nonuniformity in light emission intensity due to nonuniformity in transistor conductance is suppressed. In addition, since the resistance of the driving transistor in the off state is extremely larger than the resistance of the organic EL element in the off state, the organic EL element can be reliably turned off.
(Second embodiment)
FIG. 8 is a schematic diagram showing the arrangement of display elements in each pixel of the display device according to the second example of the present invention. In this embodiment, n display elements having the same element area are arranged for one pixel.
[0047]
In the configuration of this embodiment, a halftone of (n + 1) gradation levels can be expressed for one pixel. The n display elements are classified into p groups, and the i (1 ≦ i ≦ p) -th group has 2 ^i-1 Display elements are assigned. In the figure, the number given to each element represents a group number. Here, n + 1 = 2 between the displayable gradation number (n + 1) and p. ^p The relationship is established.
[0048]
In this embodiment, gradation display of (n + 1) gradation levels is performed by controlling the light emission state of the n display elements in units of groups. That is, each group corresponds to each bit (digit) when the gradation level is expressed in binary.
[0049]
As shown in FIG. 8, n display elements in each pixel are arranged in two columns, (n−1) / 2 in one column and (n + 1) / 2 in the other column. Is arranged. By arranging in two rows in this way, the aspect ratio can be made closer to 1 than in the case of arranging in one row.
[0050]
Various forms can be considered as to how and in which column the display elements of each group are arranged.
[0051]
In the example of FIG. 8A, among the n display elements, the display element group assigned to the 1st to (p-1) th group is in one column, and the display element group assigned to the pth is the other. It is arranged in the column.
[0052]
In the example of FIG. 8B, among the n display elements, the display elements assigned to the first group are arranged in a column in which (n + 1) / 2 display elements are arranged. Further, half of the display element groups assigned to each group other than the first group are arranged in one column and the remaining half are arranged in the other column.
[0053]
In the example of FIG. 8C, among the n display elements, the display element assigned to the first group is placed in the column in which (n−1) / 2 display elements are arranged. The display element group assigned to the group is arranged in a column in which (n + 1) / 2 display elements are arranged. Further, half of the display element groups assigned to each group other than the first group and the second group are arranged in one column and the remaining half are arranged in the other column.
[0054]
Furthermore, by arranging the n display elements so that the center of gravity of the display element group for each group is located on the same straight line for all groups, the deviation of the light emission center of gravity during halftone expression is reduced. Can be made.
[0055]
In the example of FIG. 9A, among the n display elements, the display element group assigned to the 1st to (p-1) th group is in one column, and the display element group assigned to the pth is the other. Further, the center of gravity of the display element group for each group is arranged on the straight line 50 with respect to all the groups.
[0056]
In the example of FIG. 9B, among the n display elements, the display elements assigned to the first group are placed in the column where (n−1) / 2 display elements are arranged. The display element group assigned to the group is arranged in a column in which (n + 1) / 2 display elements are arranged. In addition, the display element groups assigned to each group excluding the first and second groups are arranged such that half of them are arranged in one column and the other half are arranged in the other column. The center positions are arranged on the straight line 50 for all groups.
[0057]
Here, in each of the above examples, it may be arranged such that the figure connecting the centroids of the adjacent display elements is an equilateral triangle, that is, the distances between the adjacent display elements are equal. Such a form in which the display elements are arranged at equal intervals is suitable when the display elements are formed by an inkjet process.
[0058]
Further, in each of the above embodiments, the display elements are arranged in a state where the positions of the display elements are shifted in the adjacent columns. However, as shown in FIGS. It is also conceivable to arrange them so as not to shift.
(Pixel arrangement)
With reference to FIG. 11, a pixel arrangement method in the present invention will be described. In the first embodiment and the second embodiment, the outer shape of each pixel is trapezoidal. As a method for arranging such trapezoidal pixels, as shown in FIG. 11 (a), a method of inverting the orientation for each horizontal row as shown in FIG. 11 (a), or for each adjacent pixel as shown in FIG. 11 (b). A method in which the orientation is reversed can be considered.
[0059]
When the display elements are arranged as shown in FIG. 10, the arrangement as shown in FIG. 11C can be considered.
[0060]
By arranging in this way, it becomes possible to arrange pixels with no gaps, and dead space can be suppressed.
[0061]
Here, regarding the display elements, regardless of the arrangement of the pixels, it is conceivable to arrange the display elements so that the distance between the display elements in the pixel is equal to the distance between the display elements in the adjacent pixels, that is, at equal intervals. Such a form in which the display elements are arranged at equal intervals is suitable when the display elements are formed by an inkjet process.
[0062]
In the pixel arrangement as described above, a display element such as an EL element can be driven by providing the driving transistor and the selection transistor as described with reference to FIGS.
(Bus wiring layout)
With reference to FIG. 12, a description will be given of a bus wiring arrangement method in the case where seven display elements are arranged in each pixel.
[0063]
In this case, the seven display elements are classified into three groups, one display element for the first group, two display elements for the second group, and four displays for the third group. Elements will be assigned. In the figure, the numbers assigned to the display elements represent group numbers. The light emission state of each pixel is determined by controlling ON / OFF in units of these three groups.
[0064]
As shown in FIG. 12A, one signal line is arranged adjacent to each group. Specifically, a signal line 61 is wired adjacent to the first group, a signal line 62 is wired adjacent to the second group, and a signal line 63 is wired adjacent to the third group. Further, the scanning line 64 is wired adjacent to at least one of the display elements assigned to each group.
[0065]
When the bus wiring is wired in this way, it is desirable to arrange the pixels as shown in FIG. 11B in consideration of the connection of the scanning lines between the pixels. FIG. 12B shows how scanning lines are connected between pixels in such a case.
[0066]
Note that when pixels are arranged as shown in FIG. 11C, the scanning lines can be wired in a straight line as shown in FIG.
(Other variations)
The display device of the present invention can be used in an electronic device having a display device, such as a video camera, a digital camera, a car audio, a video CD player, a portable terminal, a notebook computer, or the like.
[0067]
The present invention is not limited to the above-described embodiments, and can be variously modified and applied. Various modifications can be made to the gradation level, the number of colors, the pixel shape, the arrangement of display elements, and the like. For example, in each of the embodiments described above, the display element has a circular shape, but a display element having an elliptical shape or the like with a curved contour may be used. Further, for example, in each of the above-described embodiments, the arrangement example of the display element in each pixel has been described. However, if the pixel is composed of sub-pixels corresponding to a plurality of colors, the present invention is displayed in each sub-pixel. It is also possible to apply to the arrangement of elements.
[0068]
Moreover, in the said Example, although the organic electroluminescent element is used as a display element, you may use an inorganic electroluminescent element as a display element. Further, the present invention is not limited to an active matrix display device and can be applied to a passive matrix display device and a liquid crystal display device.
[0069]
【The invention's effect】
The present invention relates to the arrangement of display element groups arranged in each pixel, and reduces the bias of the light emission center of gravity at the time of halftone expression while considering the aspect ratio of the pixel shape, and reduces the dead space in the pixel. A possible arrangement can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an arrangement of display elements in each pixel of a display device according to a first example of the present invention.
FIG. 2 is a schematic diagram showing an arrangement of display elements in each pixel of the display device according to the first example of the present invention.
FIG. 3 is a schematic diagram showing an arrangement of display elements in each pixel of the display device according to the first example of the present invention.
FIG. 4 is a schematic diagram showing an arrangement of display elements in each pixel of the display device according to the first example of the present invention.
FIG. 5 is an equivalent circuit diagram of each pixel when the first embodiment of the present invention is realized by a TFT and an organic EL element.
FIGS. 6A and 6B are a plan view and a cross-sectional view of each pixel when the first embodiment of the present invention is realized by a TFT and an organic EL element. FIGS.
FIG. 7 is a diagram for explaining a driving method of the display device when the first embodiment of the present invention is realized by a TFT and an organic EL element.
FIG. 8 is a schematic diagram showing an arrangement of display elements in each pixel of a display device according to a second example of the present invention.
FIG. 9 is a schematic diagram showing an arrangement of display elements in each pixel of a display device according to a second example of the present invention.
FIG. 10 is a schematic diagram showing an arrangement of display elements in each pixel of a display device according to a second example of the present invention.
FIG. 11 is a schematic diagram showing the arrangement of each pixel in the display device of the present invention.
FIG. 12 is a schematic diagram for explaining the arrangement of bus wiring according to the present invention.
FIG. 13 is a schematic diagram for explaining a difference between an element area and a light emission area.
[Explanation of symbols]
11, 12, 13 Display element

Claims (9)

It includes pixels formed in a matrix, and each pixel is provided with n (n ≧ 3) display elements,
When the number of gradations that can be displayed per pixel is 2 ^p gradations, n and p are in a relationship of n + 1 = 2 ^p ,
The n display elements are classified into p groups, and 2 ^i-1 display elements are allocated to the i (1 ≦ i ≦ p) th group ,
A display device that performs gradation display by controlling the light emission state of the n display elements in units of groups,
The n display elements are arranged in two columns, and (n-1) / 2 display elements are arranged in one column and (n + 1) / 2 display elements are arranged in the other column. Display device. It includes pixels formed in a matrix, and each pixel is provided with n (n ≧ 3) display elements,
When the number of gradations that can be displayed per pixel is 2 ^p gradations, n and p are in a relationship of n + 1 = 2 ^p ,
The n display elements are classified into p groups, and 2 ^i-1 display elements are allocated to the i (1 ≦ i ≦ p) th group,
A display device that performs gradation display by controlling the light emission state of the n display elements in units of groups,
The n display elements are arranged in two columns, the display element group assigned to the 1st to (p-1) th groups is in one column, and the pth display element group is in the other column. A display device characterized by being arranged in the above. It includes pixels formed in a matrix, and each pixel is provided with n (n ≧ 3) display elements,
When the number of gradations that can be displayed per pixel is 2 ^p gradations, n and p are in a relationship of n + 1 = 2 ^p ,
The n display elements are classified into p groups, and 2 ^i-1 display elements are allocated to the i (1 ≦ i ≦ p) th group,
A display device that performs gradation display by controlling the light emission state of the n display elements in units of groups,
The n display elements are arranged in two columns, and the display element group assigned to each group excluding the first group is arranged in half in one column and the remaining half in the other column. A display device. It includes pixels formed in a matrix, and each pixel is provided with n (n ≧ 3) display elements,
When the number of gradations that can be displayed per pixel is 2 ^p gradations, n and p are in a relationship of n + 1 = 2 ^p ,
The n display elements are classified into p groups, and 2 ^i-1 display elements are allocated to the i (1 ≦ i ≦ p) th group,
A display device that performs gradation display by controlling the light emission state of the n display elements in units of groups,
The n display elements are arranged in two columns, the display element assigned to the first group is in the first column, the display element group assigned to the second group is in the second column, Half of the display element groups assigned to each group other than the first group and the second group are arranged in the first column and the remaining half are arranged in the second column. Display device. It includes pixels formed in a matrix, and each pixel is provided with n (n ≧ 3) display elements,
When the number of gradations that can be displayed per pixel is 2 ^p gradations, n and p are in a relationship of n + 1 = 2 ^p ,
The n display elements are classified into p groups, and 2 ^i-1 display elements are allocated to the i (1 ≦ i ≦ p) th group,
A display device that performs gradation display by controlling the light emission state of the n display elements in units of groups,
The n display elements are arranged in two columns, and (n-1) / 2 display elements are arranged in one column and (n + 1) / 2 display elements are arranged in the other column. The display device, wherein the n display elements are arranged so that the center of gravity of the element group is positioned on the same straight line for all the groups. N is 3;
The display device according to claim 1, wherein the three display elements in each pixel are arranged so that a figure connecting the centers of gravity of the display elements is an isosceles triangle. . Display device according to any one of claims 1 to 6, wherein the display element is an EL element. Display device according to any one of claims 1 to 7, characterized in that the contour of the display element is formed in a curved shape.   The electronic device apparatus provided with the display apparatus as described in any one of Claims 1 thru | or 8.

Images